/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraCommon.h
bool Matches ( const [FNiagaraVariableBase](API\Plugins\Niagara\FNiagaraVariableBase) & OldVariable, const [FVersionedNiagaraEmitter](API\Plugins\Niagara\FVersionedNiagaraEmitter) & InEmitter, [ENiagaraRendererSourceDataMode](API\Plugins\Niagara\ENiagaraRendererSourceDataMode) InSourceMode )